The Queensland Police Service has defended its staff support services after being accused of disregarding whistleblowers.

Former Senior Constable Ian Birchley lodged a complaint with the Crime and Misconduct Commission (CMC) in 2004, claiming he had heard colleagues bragging about picking fights with drunks.

He has told ABC1's 7.30 Report he was ostracised after making the complaint and refused a transfer by two senior officers.

He also says a Magistrate found two Assistant Commissioners unreasonably blocked his transfer request.

"The positions that were available in Kingaroy over those months came and went and were invariably filled one way or another which upon analysis really supported my view that I was being targeted," he said.

"I could almost go anywhere so long as it wasn't somewhere that I wanted to go."

Assistant Commissioner Peter Martin from the Ethical Standards Command says support services have improved since 2004.

"Over the last number of years there have been significant improvements in terms of the way that internal witness support works and the level of support that is being afforded to individuals," he said.

"There has been a lot that has changed over the last four, five years or more, particularly in the context of the culture of people coming forward and the support for people in terms of doing that."